Efficient transformation of CO2 into quinazoline-2,4(1H,3H)-diones at room temperature catalyzed by a ZnI2/NEt3 system

Abstract

The readily available ZnI₂/NEt₃ system was used firstly to catalyze the transformation of CO₂ and 2-aminobenzonitriles into quinazoline-2,4(1H,3H)-diones at room temperature and low CO₂ pressure in high yields. Further experiments indicated that this ZnI₂/NEt₃ system has excellent effects on activating both amino and cyano groups.